The goal of this paper is to simultaneously unbundle two interacting reduced-form building blocks of traditional macroeconomic models: the representative agent and the aggregate production function. We introduce a broad class of disaggregated general equilibrium models with Heterogeneous Agents...

The interaction of input-output networks with industrial structure affects the propagation and amplification of shocks, and is an important consideration for business cycle fluctuations. This paper shows how the extensive margin of entry and exit can greatly amplify idiosyncratic shocks in the...